21246460619 has 2 divisors, whose sum is σ = 21246460620. Its totient is φ = 21246460618.

The previous prime is 21246460597. The next prime is 21246460663. The reversal of 21246460619 is 91606464212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21246460619 - 2²⁴ = 21229683403 is a prime.

It is a super-2 number, since 2×21246460619² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21246460219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623230309 + 10623230310.

It is an arithmetic number, because the mean of its divisors is an integer number (10623230310).

Almost surely, 2^21246460619 is an apocalyptic number.

21246460619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246460619 is an equidigital number, since it uses as much as digits as its factorization.

21246460619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 21246460619 in words is "twenty-one billion, two hundred forty-six million, four hundred sixty thousand, six hundred nineteen".